package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        // 1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        // 2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            // 账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        // 密码比对
        // 将用户输入的密码进行加密
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        // TODO 后期需要进行md5加密，然后再进行比对
        if (!password.equals(employee.getPassword())) {
            // 密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            // 账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        // 3、返回实体对象
        return employee;
    }


    /**
     * 新增员工
     *
     * @param employeeDTO
     */
    @Override
    public void addEmp(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        // 属性拷贝
        BeanUtils.copyProperties(employeeDTO, employee);
        // 1.补充缺失的属性值
        // 将密码加密
        employee.setPassword(
                DigestUtils.md5DigestAsHex(
                        PasswordConstant.DEFAULT_PASSWORD.getBytes()
                )
        );
        employee.setStatus(StatusConstant.ENABLE);
        // employee.setCreateTime(LocalDateTime.now());
        // employee.setUpdateTime(LocalDateTime.now());
        // 获取线程中的员工id
        Long operateEmpId = BaseContext.getCurrentId();
        // employee.setCreateUser(operateEmpId);
        // employee.setUpdateUser(operateEmpId);
        // 2.调用mapper的新增放啊，将员工对象存入employee表中
        employeeMapper.insert(employee);
    }

    /**
     * 员工分页查询 -- 需要用上分页插件pagehelper
     *
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        // 1.给pagehelper设置分页参数
        PageHelper.startPage(
                employeePageQueryDTO.getPage(),
                employeePageQueryDTO.getPageSize()
        );
        // 2.调用mapper的查询方法，并强转返回类型为page
        Page<Employee> page = employeeMapper.list(employeePageQueryDTO.getName());
        // 3.封装pageresult对象并返回
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 修改员工状态
     *
     * @param status
     * @param id
     */
    @Override
    public void enableOrDisable(Integer status, Long id) {
        //     补充参数
        Employee employee = Employee
                .builder()
                .id(id)
                .status(status)
                // .updateTime(LocalDateTime.now())
                // .updateUser(BaseContext.getCurrentId())
                .build();
        // 更新数据
        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        Employee byId = employeeMapper.getById(id);
        byId.setPassword("******");
        return byId;
    }

    /**
     * 更新员工信息
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        // 拷贝属性
        BeanUtils.copyProperties(employeeDTO, employee);
        // // 补充数据
        // // 补充更新时间
        // employee.setUpdateTime(LocalDateTime.now());
        // // 补充更新人
        // employee.setUpdateUser(BaseContext.getCurrentId());
        // 更新数据
        employeeMapper.update(employee);
    }


}
